Grain-separator.



A. S. FROSLID.

GRAIN SEPARATOR.

APPLICATION Hum SEPT.16, 1912.

Patented May 12, 19%

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GRAIN SEPARATOR.

APPLICATION FILED SEPT. 16, 1912.

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A. S. FROSLID.

GRAIN SEPARATOR.

APPLICATION FILED SBPT.16, 1912.

Patented May 12, 1914:.

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o o o 0 o COZtJMBIA PLANOOIAFII C U TED STATES PATENT OFFICE.

ANTON S. FROSLID, 0F MINNEAPOLIS, MINNESOTA.

GRAIN-SEPARATOR.

To all whom it may concern Be it known that I, ANTON S. FnosLn), a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Grain- Separato-rs; and I do hereby declare the following to be a full, clear, and exact descrip tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to grain separators, adapted for use in the separation of various different kinds of materials, but especially designed and particularly adapted for use to separate wheat and oats, and the other finer seeds and foreign materials, usually found commingled therewith. Mixtures of this character are generally known as succotash.

Generally stated, the invention consists of the novel devices and combinations of devices, hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings; Figure 1 is a view in side elevation, showing the improved grain separator embodying the pres ent invention; Fig. 2 is a vertical section taken centrally through the machine from front to rear thereof; Fig. 3 is a horizontal section, taken approximately on the line on m of Fig. 2; and Fig. 4 is a fragmentary view in vertical section on the line m m of Fig. 3, showing the parts on a larger scale than in the other views and showing also a portion of the feed hopper.

All of the parts of the machine are sup ported, directly or indirectly, on a skeleton framework 1, which at its upper portion rigidly supports the feed hopper 2. This feed hopper 2 has a discharge throat 3 that extends transversely across the bottom thereof and is adapted to be opened to any desired extent, or to be closed, by a gate 4; of the usual or any suitable construction.

This invention is directed to an improved arrangement of the vertical spaced sieves 5 and interposed dividers 6 of a gang of sieves that is carried by a vibratory shoe 7. The shoe 7 has a bottom deck 8, and it is mounted for vibratory movements on hanger straps 9 and supporting levers 10 the former of which are pivotally attached at the upper Specification of Letters Patent.

Application filed September 16, 1912.

atented May 12, 1914.

Serial No. 720,576.

ends at the side of the hopper 2, and the latter of which are intermediately pivoted to the projecting bars of the frame 1. The interposed dividers 6 and the bottom deck 8 of the shoe are of imperforate material, preferably, sheet metal. By the statement that the said parts are imperforate, is meant that they are of such material that neither wheat nor oats or the other elements to be separated will pass therethrough, but must pass over the same.

Separating sieves, as hitherto employed in grain separators, have usually been of such construction and arrangement that the center or intermediate portions thereof would sag under load and under continual usage. This sag tends to cause the grain traveling over the same to collect in a thick body on the sagging portion of the sieve, and thus to establish a main current flowing over the intermediate portion of the sieve. As a result of this, it has been practically impossible to keep the grain evenly spread out in thin sheets over the sieves, and the oats in a horizontal position. plished, it is well known that good separation of wheat and oats cannot be obtained.

In my experience, I have found that, if the sieve can be kept perfectly or substantially flat and free from sag, cats can be kept horizontally disposed thereon and good separation of wheat and oats can be accomplished with the use of dividers interposed between the sieves at predetermined distances there from, and having no riding action on the stock. Otherwise stated, sieves with sag therein require flexible riders which will adapt themselves to the sag therein, and these flexible riders only in part overcome the bad action resulting from the sag in the sleves.

To meet the above conditions in an extremely simple manner and by highly efficient means, I have provided a novel arrangement of sieves and dividers, the preferred arrangement of which is illustrated in the drawings and which will now be further described. The sieves 5 are provided with longitudinally spaced transversely extended imperforate zones or sections 5. The interposed dividers 6 are secured at the ends to the frames of the sieves5 that they immediately underlie. At their upper edges these dividers are formed with upturned flanges or ribs 6 that directly engage the under sur faces of the imperforate zones 5 of said sieves. These ribs may be provided in different ways, but are, preferably, formed integral with the respective dividers 6 and perform two important functions; 6., that of stiffening the said dividers and reinforcing and supporting the intermediate portions of the sieves so that the said sieves will not sag, but will maintain the desired fiat form. It

is important to note that each divider 6 has an upper edge portion that underlies an imperforate zone of an overlying sieve and has a lower edge portion that overlies or is in position to deliver stock unto an imperforate zone of an underlying sieve.

A suitable form of feed device is employed for regulating the delivery of the succotash or stock Z from the feed hopper 2, onto the head or receiving end of an uppermost or scalping sieve 13, which latter is carried by the shoe 7 and overlies the upper sieve 5 of the gang proper.

In the drawings, there is shown a novel form of feed device which is more fully disclosed and broadly claimed in application S. N. 720,575, filed of date, September 16, 1912, by myself and Grunerius Troseth, and entitled Feeding device for grain-separators. The parts of this feed device may, therefore, be here briefly described as follows :The numeral 14; indicates the socalled throat plate that is secured to the lower back portion of the hopper 2 and underlies the feed throat 3 of said hopper with its slightly flexible front edge resting on a bearing plate 15. carried by the head of the.

sieve shoe 7 The numeral 16 indicates a socalled retaining plate which overlies but 1s spaced above the upper portion of the scalp ing screen 13 and, at its ends, is mounted for short sliding movements in guides 13 formed in the sides of the frame of the said 7 sieve 13. The sieve 13, of course, vibrates 4 19 and a fan head 20 working thereon. The

fan casing 19 is provided with a discharge spout 21, which delivers directly below two receiving hoppers 22 and 23, suitably supported by the frame 1. The fan head 20 is carried by the shaft 20 journaled in suitable bearings ona frame 1 and provided at one end wit-h a small sprocket 24- and at each end with a crank 25. The cranks 25 are con nected by connecting rods 26 to thelower ends of levers 10. The sprocket 24 is driven by a sprocket chain 27 that runs over the suitably journaled to the side of the frame 1 and provided with an operating crank 29. Underlying the fan casing 19 and receiving from the hopper 22, is the usual or any suitable form of long meshed sieve 30, the shoe 31 of which, at one end, is pivotally supported by the levers 10* and, at its other end,

very greatly facilitates the subsequent action of the gang of sieves.

The general principles of subdivision and successive separation of the stock, which is performed in my prior Patent, No. 684,7 51 of date October 15th, 1901, are carried out in the present gang of sieves. 5 and interposed dividers 6, and the dividers of my present machine have all of the functions of the dividing aprons of my said prior patent, except that of a riding action on the stock.

The oats will be delivered ofi from the lower.

ends of the several sieves 5 while all of the good wheat and some small seeds and refuse materials, such as pin oats, for eXample,'will pass through the several sieves 5 onto the bottom deck 8 of the shoe 7 and, from thence, will be delivered through the receiving hopper 22, through the fan blast and onto the long meshed sieve 30 by the action of which latter all such refuse materials'will be separated from the good wheat. It is, however, highly important to note that the interposed dividers 6 each underlies a perforate zone of an overlying. sieve and its lower edge is so positioned that it will deliver the stock, received thereon from the said overlying sieve, directly onto an imperforate zone of an underlying sieve. Hence, the oats delivered off from the lower edge of a divider, may happen to fall endwise, but cannot pass directly downward through an underlying sieve; but, striking the imperforate zone or section, will be turned flatwise onto the sieve and, hence, the chances of the oats passing over the next perforate zone of the said sieve, are very greatly increased.

The receivinghopper 23, which may be employed when desired, is located near to the delivery ends of the bankof sieves 5and the stock delivered thereinto will contain less wheat and more oats than the stock deliv ered into the hopper 22, and this stock may be caught by a suitable receptacle, not shown, and aga-inrun through the machine '65 same and over a large driving sprocket 28, l for the purpose of re-cleaning. V

What I claim is 1. In a grain separator, a gang of superimposed perforated sheet metal sieves inclining in a common direction and having alternated perforated and imperforate transversely extended zones, and a series of interposed rigid dividers inclining in the same direction as said sieves and having upper edge flanges that underlie and reinforce imperforate zones of an overlying sieve and having lower edges arranged to deliver onto imperforate zones of an underlying sieve.

2. In a grain separator, a gang of superimposed perforated sheet metal sieves inclining in a common direction and having alternated perforated and imperforate transversely extended zones, and a series of interposed rigid dividers inclining in the same direction as said sieves and having upper edges that underlie imperforate zones of an overlying sieve and having lower edges arranged to deliver onto imperforate zones of an underlying sieve, the said dividers having integral upturned upper edges that contact with and reinforce the imperforate zones of an overlying sieve.

3. In a grain separator, a gang of superimposed perforated sheet metal sieves inclining in a common direction and having alternated perforate and imperforate transversely extended zones, and a series of interposed rigid dividers inclined in the same direction as said sieves and having upper edges that extend from imperforate zones of an overlying sieve and having lower edges arranged to deliver onto imperforate zones of an underlying sieve.

In testimony whereof I affix my signature in presence of two witnesses.

ANTON S. FROSLID.

Witnesses:

F. D. MERCHANT, HARRY D. KiLoonn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. G. 

